chromeos: converts PanelLayoutManager to aura::Window

ash/wm/panels/panel_layout_manager_unittest.cc

Index: ash/wm/panels/panel_layout_manager_unittest.cc
diff --git a/ash/wm/panels/panel_layout_manager_unittest.cc b/ash/wm/panels/panel_layout_manager_unittest.cc
index 0ea8f0281109a079ca66cf2355f62f0291568355..9bf9b691fc6fb4d669c5af681cc9648783545284 100644
--- a/ash/wm/panels/panel_layout_manager_unittest.cc
+++ b/ash/wm/panels/panel_layout_manager_unittest.cc
@@ -105,12 +105,10 @@ class PanelLayoutManagerTest : public test::AshTestBase {
   }
 
   views::Widget* GetCalloutWidgetForPanel(aura::Window* panel) {
-    WmWindow* wm_panel = WmWindow::Get(panel);
-    PanelLayoutManager* manager = PanelLayoutManager::Get(wm_panel);
+    PanelLayoutManager* manager = PanelLayoutManager::Get(panel);
     DCHECK(manager);
-    PanelLayoutManager::PanelList::iterator found =
-        std::find(manager->panel_windows_.begin(),
-                  manager->panel_windows_.end(), wm_panel);
+    PanelLayoutManager::PanelList::iterator found = std::find(
+        manager->panel_windows_.begin(), manager->panel_windows_.end(), panel);
     DCHECK(found != manager->panel_windows_.end());
     DCHECK(found->callout_widget);
     return found->CalloutWidget();